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- .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
- .. c:namespace:: V4L
- .. _common:
- ###################
- Common API Elements
- ###################
- Programming a V4L2 device consists of these steps:
- - Opening the device
- - Changing device properties, selecting a video and audio input, video
- standard, picture brightness a. o.
- - Negotiating a data format
- - Negotiating an input/output method
- - The actual input/output loop
- - Closing the device
- In practice most steps are optional and can be executed out of order. It
- depends on the V4L2 device type, you can read about the details in
- :ref:`devices`. In this chapter we will discuss the basic concepts
- applicable to all devices.
- .. toctree::
- :maxdepth: 1
- open
- querycap
- app-pri
- video
- audio
- tuner
- standard
- dv-timings
- control
- extended-controls
- ext-ctrls-camera
- ext-ctrls-flash
- ext-ctrls-image-source
- ext-ctrls-image-process
- ext-ctrls-codec
- ext-ctrls-codec-stateless
- ext-ctrls-jpeg
- ext-ctrls-dv
- ext-ctrls-rf-tuner
- ext-ctrls-fm-tx
- ext-ctrls-fm-rx
- ext-ctrls-detect
- ext-ctrls-colorimetry
- fourcc
- format
- planar-apis
- selection-api
- crop
- streaming-par
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